Furnace ignition arch



Jan. 9, 1940. F. CASH FURNACE IGNITION ARCH Filed March 21, 1958 '2 Sheets-Sheet 1 INVENTOR ,C'aak I Finley ATTORNEYS Jan. 9, 1940. F. CASH 2,186,521

FURNACE IGNITION ARCH Filed March 21, 1938 2 Sheets-Sheet 2 Patented Jan. 9, 1940 UNITED STATES PATENT OFFICE' FURNACE IGNITION ARCH Finley Cash, Mechanicvill e, N. Y.

Application March 21, 1938, Serial No. 197,257

'1 Claim.

This invention relates to a' furnace ignition arch and has for an object to provide an arch formed of heat resistant tiles suspended or hung pendulum-like from a framework which maintains the tiles plum at all times and which is disposed remote from the bottom or fire contact surfaces of the tiles.

A further object is to provide an ignition arch which will be supported in place without the use of bolts or nuts and which will employ a removable section of the framework carrying with it a plurality of the tiles so that access may be facilitated for repairs when necessary.

A further object is to provide an ignition arch which will be formed of a few strong simple and durable parts, which will have longer life than conventional ignition arches, which will be inexpensive to manufacture and install, and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification,

Figure 1 is a side elevation of an ignition arch constructed in accordance with the invention.

Figure 2 is a fragmentary cross sectional view of the arch taken on the line 22 of Figure 1 with parts broken away.

Figure 3 is a fragmentary longitudinal sectional view taken on the line 3-3 of Figure 2.

Figure 4' is a fragmentary cross sectional view taken on the line 4-4 of Figure 3, and showing the spacers and the cross bars for attaching the I longitudinal beams to the cross beams, in plan.

Figure 5 is a cross sectional view taken on the line 5-5 of Figure 1 showing the removable central section of the ignition arch and showing the keys for detachably securing the removable central section to the stationary end sections.

Figure 6 is a fragmentary perspective view showing one of the joints between the removable central sections of the longitudinal beam and the terminal stationary sections. Figure 7 is a fragmentary plan view with portions broken away showing one of the springs for holding the tiles pressed closely together.

Figure 8 is an exploded perspective view showing the key hanger rod and inverted U-shaped retainer for suspending the longitudinal beams from the cross beams of the framework.

Figure 9 is a perspective view of one of the cross bars carried by the hanger rods having notches in the ends to receive the flanges of a pair of longitudinal beams which carry the tiles.

Figure 10 is an exploded perspective view of one of the spacers and one of the wedges for securing the spacer in place.

Referring now to the drawings in which like in charactersof reference designate similar parts 1 in the various views, l0 designates in general the masonry walls of a boiler II. The ignition arch comprising the subject matter of this invention is of the flat arch type and comprises a plurality of heat resistant tiles I! each having a T-shaped head l3 located centrally on the' upper edge as best shown in Figures 2 and 5, for suspending the tiles from a framework comprising longitudinal beams H which are in turn suspended go from cross beams I5, the ends of which are supported by the masonry walls In of the furnace.

All of the beams are of channel cross section and the longitudinal beams H are arranged in pairs spaced apart sufiiciently to permit the lower flanges thereof engaging underneath the T- shaped heads of a row of tiles. The upper flanges of said pair of said beams are bridged at intervals by cross bars l6, shown best in Figure 9 and having notches I! in the ends to receive my the flanges.

The longitudinal beams of each associated pair are held in spaced relation by spacers i8, best shown in Figure 10. Each spacer is provided at the ends with stop flanges I9 to engage against the inner faces of the beams and beyond the stop flanges are provided with, T-shaped heads 20 which project through openings 2| formed in thewebs of the beams, as best shown in Figure 2. Inverted U-shaped wedges 22 are disposed 4" astride the heads and bear against the outer faces of the longitudinal beams.

The longitudinal beams are suspended from cross beams 23 through the instrum'entality of hanger rods 24, best shown in Figure 3. The 4:, cross beams are of channel cross section and each pair of cross beams has the upper flanges spanned by a bridge plate 25 which is suspended upon the upper face of the flanges and is provided with a central opening 26 to receive the hanger rod 24. 50 A key 21, is passed through an opening 28 in the rod and bears uponthe top face of the bridge plate to removably secure the rod in place.

Spacers 29 of the general type heretofore described are employed'to space the cross beams apart and inverted U-shaped wedges 10 of the type heretofore described coact with the T-shaped heads of the spacers to removably secure the spacers in place.-

The lower end of each rod 24 passes through a central opening 3| formed in the cross bar It heretofore described which cross bar engages the bottom flanges of each pair of tiles holding longitudinal beams l4. A key 32, best shown in Figure 8, is passed through an opening 33 formed in the rod below the cross bar l6 and the key is held in place against accidental removal through the instrumentality of an inverted U-shaped keeper 34 which is provided with an opening 35 to receive the rod and which straddles the cross bar and engages the ends of the key, as best shown in Figures 3 and 4.

In order to facilitate repairs being made a plurality of the tiles I2 at the central portion of the arch are supported by a central removable section of the longitudinal beams l4. As best shown in Figure 6, the end sections of the longitudinal beams are stationary while the central sections 36 are removably associated with the stationary sections. For this purpose the central sections are cut away, as are also the stationary sections to provide flanges 31 on the central sections which are supported upon the webs 38 of the stationary sections. Eye bolts 39 are secured to the flanges 31 so that a conventional block and tackle may be hooked into the eye bolts to bodily lift the central removable section of the arch and permit access to the arch through the opening thus made to facilitate repairs.

As best shown in Figure 5 spacers 40 of the general type heretofore described and shown in Figure 10, are disposed on opposite sides of the meeting ends of the stationary sections and reshape shown in Figure l is provided in the bottom edge with slots 44 to receive each pair of adjacent T-heads II and hold the removable central sections of each longitudinal beam assembled with the associated terminal stationary sections of the beam.

As best shown in Figures 1 and '7 the tiles are all pressed closely together by helical springs 45 which are sleeved on pins 46 each having a head 41 which bears against the section of the last tile at one end of the row and at the opposite end bears against an abutment plate 48 which is provided with flanges 49 which are riveted as shown at 50 to the webs of the longitudinal beams l4. The pins 46 slidably flt in openings 5| formed in the abutment plate.

From the above description it will be seen that the use of bolts is dispensed with and it will be further seen that the heat resistant tile l2 will be suspended from the framework of longitudinal beams l4 and cross beams 23, which latter beams are located remote from the faces of the tiles which are exposed to flame.

What is claimed is:

In a flat ignition arch, spaced channel beams arranged in pairs with their flanges turned to ward each other, a row of tiles having T'-shaped heads engaged over the lower flanges of each of said pair of beams, spaced cross bars bridging the upper flanges of each pair of beams and having notches receiving and accurately spacing apart said upper flanges, spacers engaged between each pair of beams disposed intermediate the upper flanges and the lower flanges thereof and provided with stop shoulders adapted to engage against the inner faces thereof, said spacers projecting through said pair of beams exteriorly of the beams and being provided with T-shaped heads, and inverted U-shaped wedges disposed astride the heads and bearing against the outer faces of said pair of beams.

- FINLEY CASH. 

